Wrench



(No Model.)

H. A THOMPSON.

Wrench.

No. 234,091. Patented Nov. 2,1880.

Elven/Z27. 25

UNITED STATES PATENT OFFICE,

HENRY A. THOMPSON, OF FARMINGTON, MAINE.

WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 234,091, datedNovember 2, 1880.

Application filed August 2, 1880. (No model.)

To all whom it may concern Beitknown that I, HENRY ARTEMAS THoMP- sort,a citizen of the United States, residing at Farmington, in'the county ofFranklin and State of Maine, have invented certain new and usefulImprovements in Wrenches; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention relate; to certain improvements in wrenches, and it isparticularly designed to be employed as a nut-wrench for carriages,although it is applicable to all other purposes for which a wrench isrequired.

My invention has for its objects to provide a wrench that may be cheaplyconstructed, and that may be conveniently and quickly adjusted to fit anut of any size, and rapidly operated to secure or detach the nut, thatwill not be liable to drop the nut in the dirt, and which can beemployed to pick up the nut without soiling the fingers, as more fullyhereinafter specified. These objects I accomplish by the deviceillustrated in the accompanying drawings, in which- Figure 1 representsa side elevation, and Fig. 2 a front elevation, of my improved wrench.Fig. 3 is a longitudinal section of the metallic bar E, and Fig. 4 isa-perspective view of the bar shown in section in Fig. 3.

The letter A indicates a metal bar provided witha jaw, B, at one end anda screw-threaded shank, G, at the other.

The letter D indicates a lever provided with a screwthreaded apertureand mounted on the screw-threaded shank of the bar A.

The letter Eindicates a metallic bar somewhat less in length than thebar A, provided at its forward end with a jaw, F, and a rectangularopening, G, through which the bar A is passed. At its rear end the saidbar E is bent downward at a right angle, and is provided with anaperture, H, through which the screw-threaded shank of the bar A passes.

The inner faces of the two jaws are formed with angular recesses I, bymeans of which a jaw, F, and the bar square nut may be grasped at thecorners and embraced at all sides, in order to secure the most effectiveleverage upon said nut and to hold the nut securely.

The operation of my improved Wrench is as follows: The nut is securedbetween thejaws by placing the same between said jaws and advancing thebar E until the angular recesses embrace the corners of the said nut.The lever D is then turned upon the threaded shank, so as to advance itagainst the rear end of the bar E and clamp the jaw F securely againstthe nut.

When it is desired to release the nut from the wrench, or to adjust thewrench to larger nuts, the lever may be slightly started, when it can berapidly twirled by striking the respective arms successively in the samedirection, thus effecting the necessary movement of the lever with thegreatest expedition.

It will be perceived that as constructed the wrench consists of threeparts, which are extremely simple in construction, and which can bemanufactured at little expense as compared with the adjustable wrenchesin common use, and that a strong and durable article, not liable to getout of order by rough usage, is produced, and one that is applicable toalmost universal use.

I deem the lever D an important feature of the combination, allowing, asitdoes, the greatest rapidity in operating the wrench.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

The combination of the bar E, having a transverse arm at one end,provided with rectangular apertures G, at the other a similar transversearm perforated at H, and havinga A, having threaded part 0 and jaw B,the barA operating through the apertures G H of the bar E with thethreaded double lever D, as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY ARTEMAS THOMPSON.

Witnesses:

JAMES P. RUssELL, J. G. BRowv.

